3. Kill and restart the Cortana processIf you find that Cortana is not working properly, the best thing to do would be to kill Cortana process and restart the process via Task Manager. If it was a minor runtime error Cortana would just take a restart to fix it.

4. Disable Antivirus softwareSome security software are known to create this issue – Avast for instance. Disable it and see if it makes the problem go away. If your security software is the culprit, make sure you are using its latest version – else you may want to change it.